0210877Sachregister ~ London ~ magnetische Deklination / Inklination.27832542612-32lichtenberg1Thus when the Instrument for the measure of the dipping of the
needle was first made for the Royal observatory at Richmond. I
found on the
17
the
of December
1772
. to be (as near as I could
Judge that day at noon
73
degrees.
The following variations are the
best credited
Years
Names of
of Obs.
observers
°
.
'
East
_______________________
1580
Barrows
11
.
5
–
1622
Gunter
6
.
0
–
42
Years at
7
Minutes
P.
Year
1634
Gellibrand
4
.
5
–
12
Years at
Minutes p Year
1657
Bond
0
.
0
–
23
—
—
1672
Halley
2
.
30
West
1692
Halley
6
.
0
–
35
—
—
601
1722
Graham
14
13
–
1745
Graham
17
'
.
0
1746
Graham
17
30
1748
Graham
17
.
40
.
56
Years
—
602
According to the mean of the above Observations, the Variations of
the compass, westward has been about
28
degrees
45
minutes in
168
Years which nearly answers to one degree in six
Years.
sieheGesamtregister.

0210877773356Personenregister ~ Graham, George ~ Schriften ~ An account of observations made of the variation of the horizontal needle at London (1724–1725).102515826602Graham, Account 1724
sieheGesamtregister.

0210877773356Personenregister ~ Graham, George ~ Schriften ~ Some observations, made during the last three years, of the quantity of the variation of the magnetic horizontal needle to the westward (1748).102535826602ders., Observations 1748
sieheGesamtregister.

0210877773355Personenregister ~ Halley, Edmond ~ Schriften ~ An account of the cause of the change of the variation of the magnetical needle (1686–1692).102845826601Halley, Account 1692
sieheGesamtregister.